Drive apparatus for sewing machines
AssigneeH. S. Machinery Co., Ltd.
InventorTzu Sang Chan
Life of this patent
Estimating the term…
Abstract
A drive apparatus for sewing machines including a forepart and a motor shaft horizontally projecting out of the forepart is provided with a sleeve releasably secured to the motor shaft; a rotor disposed on the sleeve; and a motor assembly including a housing having an axial passage with the sleeve rotatably disposed through, an inner space disposed on an end of the housing proximate the forepart, and a stator set disposed in the inner space. The rotor is disposed in the inner space. The rotor, the sleeve, and the motor shaft are co-rotated.
Claims18
A drive apparatus for use in a sewing machine, comprising:
- a sleeve secured to an extension shaft of the sewing machine, the sleeve having a free end and an annular flange adjacent to the free end, the annular flange comprising a wall radially extended from the sleeve;
- a stator set;
- a rotor disposed on the sleeve and positioned against the wall of the flange;
- and
- a housing having an inner space and a passage through which the free end of the sleeve extends,
- wherein the stator set is disposed in the inner space of the housing for cooperation with the rotor, and wherein the rotor, the sleeve and the extension shaft are co-rotatable, the drive apparatus further comprising a first fan and a guide member fastened to the housing, the guide member having an opening in communication with the inner space of the housing, wherein the first fan is disposed between the opening of the guide member and the sleeve.
A method for use with a sewing machine, the sewing machine having an extension shaft, said method comprising:
- securing a sleeve secured to the extension shaft of the sewing machine, the sleeve having a free end and an annular flange adjacent to the free end, the annular flange comprising a wall radially extended from the sleeve;
- securing a rotor on the sleeve and positioned against the wall of the flange such that the rotor, the sleeve and the extension shaft are co-rotatable;
- providing a housing over the sleeve the housing having an inner space and a passage through which the free end of the sleeve extends;
- providing a stator set in the inner space of the housing for cooperation with the rotor;
- securing a sensor to the stator set for detecting a position of the rotor relative to the stator set while the extension shaft of the sewing machine is rotating;
- securing a guide member to the housing, the guide member having an opening, and
- providing a first fan between the opening of the guide member and the sleeve for cooling purposes.
Dependencies are inferred from the claim text.